Origin of cilium
plural noun, singular cil·i·um [sil-ee-uh m] /ˈsɪl i əm/.
Origin of cilia
Examples from the Web for cilium
Historical Examples of cilium
Each consists of a very slender curved filament, with a still finer filament, or cilium, arising from it on each side.An Elementary Text-book of the Microscope
John William Griffith
noun plural cilia (ˈsɪlɪə)
Word Origin for cilium
1715, from Latin cilia, plural of cilium "eyelid, eyelash," perhaps related to celare "to cover, hide," from PIE root *kel- "to conceal" (see cell), but words for this part of the face can be tricky (see brow). It sometimes is pluralized in English, which is an error. Related: Ciliated; ciliary; ciliate.